MK Products RoboKing - Manual (Page 3)

ii
was designed.
Remove faulty regulator from service immedi-
ately for repair (first close cylinder valve). The
following symptoms indicate a faulty regulator:
Leaks - if gas leaks externally.
Excessive Creep - if delivery pressure continues
to rise with downstream valve closed.
Faulty Gauge - if gauge pointer does not move
off stop pin when pressurized, nor returns to
stop pin after pressure release.
Repair. Do NOT attempt repair. Send faulty
regulators for repair to manufacturer’s desig-
nated repair center, where special techniques
and tools are used by trained personnel.
2. Cylinders
Cylinders must be handled carefully to prevent
leaks and damage to their walls, valves, or
safety devices:
Avoid electrical circuit contact with cylinders
including third rails, electrical wires, or welding
circuits. They can produced short circuit arcs
that may lead to a serious accident. (See 1-3C)
ICC or DOT marking must be on each cylinder.
It is an assurance of safety when the cylinder is
properly handled.
Identifying gas content. Use only cylinders with
name of gas marked on them; do not rely on
color to identify gas content. Notify supplier
if unmarked. NEVER DEFACE or alter name,
number, or other markings on a cylinder. It is
illegal and hazardous.
Empties: Keep valves closed, replace caps
securely; mark MT; keep them separate from
FULLS, and return promptly.
Prohibited use. Never use a cylinder or its con-
tents for other than its intended use, NEVER as
a support or roller.
Locate or secure cylinders so they cannot be
knocked over.
Passageways and work areas. Keep cylinders
clear of areas where they may be stuck.
Transporting cylinders. With a crane, use a
secure support such as a platform or cradle. Do
NOT lift cylinders off the ground by their valves
or caps, or by chains, slings, or magnets.
Do NOT expose cylinders to excessive heat,
sparks, slag, and flame, etc. that may cause
rupture. Do not allow contents to exceed 55
degrees C (130 degrees F.) Cool with water
spray where such exposure exists.
Protect cylinders, particularly valves from
bumps, falls, falling objects, and weather.
Replace caps securely when moving cylinders.
Stuck valve. Do NOT use a hammer or wrench
to open a cylinder valve that cannot be opened
by hand. Notify your supplier.
Mixing gases. NEVER try to mix any gases in
a cylinder.
NEVER refill any cylinder.
Cylinder fittings should never be modified or
exchanged.
3. Hose
Prohibited use. Never use hose other than that
designed for the specified gas. A general hose
identification rule is: red for fuel gas, green for
oxygen, and black for inert gases.
Use ferrules or clamps designed for the hose (not
ordinary wire or other substitute) as a binding to
connect hoses to fittings.
No copper tubing splices. Use only standard brass
fittings to splice hose.
Avoid long runs to prevent kinks and abuse. Sus-
pend hose off ground to keep it from being run over,
stepped on, or otherwise damaged.
Coil excess hose to prevent kinks and tangles.
Protect hose from damage by sharp edges, and by
sparks, slag, and open flame.
Examine hose regularly for leaks, wear, and loose
connections. Immerse pressured hose in water;
bubbles indicate leaks
Repair leaky or worn hose by cutting area out and
splicing. Do NOT use tape.
4. Proper Connections
Clean cylinder valve outlet of impurities that
may clog orifices and damage seats before con-
necting regulator. Except for hydrogen, crack valve
momentarily, pointing outlet away from people and
sources of ignition. Wipe with a clean, lintless
cloth.
Match regulator to cylinder. Before connecting,
check that the regulator label and cylinder marking
agree, and that the regulator inlet and cylinder
outlet match. NEVER Connect a regulator
designed for a particular gas or gases to a cylinder
containing any other gas.
Tighten connections. When assembling threaded
connections, clean and smooth seats where neces-
sary. Tighten. If connection leaks, disassemble,
clean, and retighten, using properly fitting wrench.
Adapters. Use a CGA adapter (available from your
supplier) between cylinder and regulator, if one is
required. Use two wrenches to tighten adapter
marked RIGHT and LEFT HAND threads.
Regulator outlet (or hose) connections may be
identified by right hand threads for oxygen and left
hand threads (with grooved hex on nut or shank)
for fuel gas.
5. Pressurizing Steps:
Drain regulator of residual gas through suitable vent
before opening cylinder (or manifold valve) by turn-
ing adjusting screw in (clockwise). Draining pre-
vents excessive compression heat at high pressure
seat by allowing seat to open on pressurization.
Leave adjusting screw engaged slightly on single-
stage regulators.
Stand to side of regulator while opening cylinder
valve.
Open cylinder valve slowly so that regulator pres-
sure increases slowly. When gauge is pressurized
(gauge reaches regulator maximum) leave cylinder
valve in following position: for oxygen and inert
gases, open fully to seal stem against possible
leak; for fuel gas, open to less than one turn to
permit quick emergency shut-off.
Use pressure charts (available from your supplier)
for safe and efficient recommended pressure set-
tings on regulators.
Check for leaks on first pressurization and regularly
thereafter. Brush with soap solution. Bubbles indi-
cate leaks. Clean off soapy water after test; dried
soap is combustible.
E. User Responsibilities
Follow all Safety Rules.
Remove leaky or defective equipment from ser-
vice immediately for repair. Read and follow
user manual instructions.
F. Leaving Equipment Unattended
Close gas supply at source and drain gas.
G. Rope Staging-Support
Rope staging-support should not be used for
welding or cutting operation; rope may burn.
1-3 ARC WELDING
Comply with precautions in 1-1, 1-2, and this
section. Arc Welding, properly done, is a safe
process, but a careless operator invites trouble.
The equipment carries high currents at signifi-
cant voltages. The arc is very bright and hot.
Sparks fly, fumes rise, ultraviolet and infrared
energy radiates, weldments are hot, and com-
pressed gases may be used. The wise operator
avoids unnecessary risks and protects himself
and others from accidents.
A. Burn Protection
Comply with precautions in 1-2.
The welding arc is intense and visibly bright.
Its radiation can damage eyes, penetrate light-
weight clothing, reflect from light-colored sur-
faces, and burn the skin and eyes. Skin
burns resemble acute sunburn; those from gas-
shielded arcs are more severe and painful.
DON’T GET BURNED; COMPLY WITH PRE-
CAUTIONS.
1. Protective Clothing
Wear long-sleeve clothing in addition to gloves,
hat, and shoes. As necessary, use additional
protective clothing such as leather jacket or
sleeves, flameproof apron, and fire-resistant
leggings. Avoid outer garments of untreated
cotton.
Bare skin protection. Wear dark, substantial
clothing. Button collar to protect chest and
neck, and button pockets to prevent entry of
sparks.
2. Eye and Head Protection
Protect eyes from exposure to arc. Eyes may
be damaged by radiant energy when exposed
to the electric arc, even when not looking in the
direction of the arc. Never look at an electric arc
without protection.
Welding helmet or shield containing a filter plate
shade no. 12 or denser must be used when
welding. Place over face before striking arc.
Protect filter plate with a clear cover plate.
Cracked or broken helmet or shield should NOT
be worn; radiation can be passed through to
cause burns.
Cracked, broken, or loose filter plates must be
replaced IMMEDIATELY. Replace clear cover
plate when broken, pitted, or spattered.
Flash goggles with side shields MUST be worn
under the helmet to give some protection to the
eyes should the helmet not be lowered over the
face before an arc is struck. Looking at an arc
momentarily with unprotected eyes (particularly
a high intensity gas-shielded arc) can cause a
retinal burn that may leave a permanent dark
area in the field of vision.
3. Protection of Nearby Personnel
Enclose the welding area. For production weld-
ing, a separate room or enclosed bay is best.
In open areas, surround the operation with low-